Combustible-mixture-forming device



Sept

HpA. TEDMAN COLJBUSTIBLE MIXTURE FORMING DEVICE Original Filed July 50.1.920

Patented Sept. 30, 11924.

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HUDsou A. 'rnnmauf-or .GAIESBURG, ILLINOIS, ASSIGNOR T0 WINSLOW BOILER &ENGINEERING COMPANY, or" CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CoMBUsTIBLn- IxTURE-Fomame DEVICE.

Application filed July 30, 1920, Serial No. 400,280. Rencwed lvlarch 10,1924.

T 0 all whom it may concern:

Be it known-that I, HUDSON A. TEDMAN, a citizen of the United States,residing at Galesburg, in the county of Knox and State of Illinois,.haveinvented certain new and useful Improvements inCombustible-Mixture-Forming Devices, of which the following is aspecification, reference being had therein to the accompanying drawing.

The invention relates to mixture forming devices for liquid fuelburners, and consists in the matters hereinafter described and thenpointed out in the claims.

In the drawings F 'ig, 1 is a longitudinal sectionaLview through thecasing showing the combined fan and beater in side elevation;

N Fig. 2 is a sectional view on the line 2-2 of Fig. l; p

' Fig. 3 is a detail sectional View of one of the blades-on the line.33of Fig; 2;

Fig. 4 is a detail perspective view of part of the combined fan andheater, and

Fig. 5 is a detail sectional View of one (if the beater blades.

The casing which. is substantially circular in contour is formed of apair of opposite side plates 10 and the peripheral curved plate 11 theseparts being of metallic construction and suitably connected in anydesired manner to form a mixing chamber for the combustible elements.One of the side plates has a central opening 12 formingthe inlet orpassage for air drawn into the chamber by the fan-beater, and the plate11 has a tangential mixture outlet 13 at one side of its lower portion.A shaftis suitably journaled' in hearings in the axial line of thecasing being-driven from a suitable motor (not shown), and carries thecombined fan and heater which is composed ofla body '15 attached totheshaft by a suitable collar 16, and a plurality of radial blades 17 beingformed by a; curved body 18 and pro-f.

which carry. beater-heads at their ends. In the construction shown thefaces or surfaces of the blades are disposed transversely-of the chamberandthe heads are spoon-shaped vided with angular side wings 19 and anoblique "end wingQOrso that as the-spoon rotates the air in leavingit isconcentrated at its tipand moves at avry high velocity.

The beater-heads the rotation of the shaft their inner'concave portionsand their wings-face theout.

are disposed so that in.

let 13 after they have passed the oil sup ply pipe. The casing isprovided with an oil supply pipe 21 which enters its lowest portion andterminates a short distance above the inner surface thereof; the oil isfed to the supply pipe by any suitable means which will cause itto passin a stream from the discharge end of the supply pipe when the device isin operation, and shut it off when the device is not operating.

When the shaft is rotated the blades move in the direction of the arrowin Fig. 1 and the suction createdby them aids todraw the oil stream moreor less in the form of a spray into the chamber, and the beaterheads hitthe stream of oil and break it up into fine particles so that it isatomized into a fine mist or vapor. The oil is thoroughly broken up andatomized into practically a gaseous state by the beateraction of theblades, and is mixed with the air which is drawn into thechamber by thefan-actionof the blades in sufficient quantity-to form a highlycombustible mixture. The spoon-shaped end of the beater with its concaveface leading causes the air in leaving it to be concentrated at the tipand move at a high velocity so that it is formed into a'powerful compactblast impinging directly on the oil inlet to produce an aspirating orsuction action to spray the oil into the chamber and to intensify itsvaporizing action in breaking the oil into fine particles. The combinedeii'ect of the atomizingof the oil by itscontact with the spoons and ofthe high velocity of the air at the tip of the spoons produces a highlycombustible mixture; the-spoons are shaped and proportioned so that theamount of air drawn in by their suction and mixed with the oil willgive}: fuel mixture that is instantaneair which supports its combustion,their intermingling being completed in the outletpassage 13, and themixture is then blown "by the fan-action of the bladesinto a suitablecombustion chamber (not shown). The blades thus. form combined fan andheater elements that draw the air necessary for com- .bustion into thechamber, spray the oil stream into the chamber and beat itinto a 'finemist-or gas, mix'the air and atomized oil into a highly combustiblemixture, and

blow this mixture into the combustion chamber.

I claim:

1. In a device of the class described, a chamber having an air-inlet andan outlet passage, an oil supply pipe, a rotatable shaft, a plurality offan blades on the sh alt in the chamber having forwardly-fileingspoon-shaped beater-heads formed at their ends.

2. In a device ofthe class described. a cylindrical casing having anair-inlet in one side and a tangential outlet in its lower portion, anoil supply pipe adjacent said outlet. a rotatable shaft, a plurality offan blades on the shaft having forwardly-facing spoonshaped beater-headsformed at their ends and provided with Wings on the sides of theirconcave portions.

In a device of the class described, a cylindrical casing having anair-inlet in one side and a tangential outlet in its loxver portion, anoil supply pipe entering the lower portion of the chamber adjacent saidoutlet, a rotatableshaft, a plurality of fan 25 blades on the shafthaving spoon-shaped beatei' lieads' formed at their ends and providedwith angular side Wings and, oblique end Wings facing in the directionof their rotation.

H. A. TEDMAN. Witnesses: i R. J. HOWARD, W. P. SMITH.

